Write and solve an equation to find x. Then find the measure of angle YXZ. The measure of angle YXZ is how many degrees?

How do you determine if an ordered pair is a solution to a given equation?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.